<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card class="box-card">
      <el-row>
        <el-col >
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <tree-table class="treeTable" :data='catelist' :columns="columns" :selection-type="false"
      :expand-type="false" show-index index-text="" border :show-row-hover="false">
      <template slot="isok" slot-scope="scope">
        <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color:lightgreen"></i>
        <i class="el-icon-error" v-else style="color:lightred"></i>
      </template>
      <template slot="order" slot-scope="scope">
        <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
        <el-tag type="success" size="mini" v-else-if="scope.row.cat_level === 1">二级</el-tag>
        <el-tag type="warning" size="mini" v-else>三级</el-tag>
      </template>
      <template slot="opt" slot-scope="">
        <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
        <el-button type="danger" icon="el-icon-edit" size="mini">删除</el-button>
      </template>
      </tree-table>
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="querInfo.pagenum"
      :page-sizes="[3, 5, 10, 15]"
      :page-size="querInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
    </el-pagination>
    </el-card>
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%" @close="addCateDialogClosed">
      <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
        <el-form-item label="分类名称:" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类:">
          <el-cascader
            v-model="selectedkeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChanged"
            clearable change-on-select>
          </el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          {
            required: true, message: '请输入分类名称', trgger: 'blur'
          }
        ]
      },
      catelist: [],
      total: 0,
      columns: [{
        label: '分类名称',
        prop: 'cat_name'
      }, {
        label: '是否有效',
        type: 'template',
        template: 'isok'
      },
      {
        label: '排序',
        type: 'template',
        template: 'order'
      },
      {
        label: '操作',
        type: 'template',
        template: 'opt'
      }],
      parentCateList: [],
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedkeys: []
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.querInfo })
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.catelist = res.data.result
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.querInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange (newPage) {
      this.querInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCateDialog () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.parentCateList = res.data
    },
    parentCateChanged () {
      if (this.selectedkeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedkeys[this.selectedkeys.length - 1]
        this.addCateForm.cat_level = this.selectedkeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate () {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) return this.$message.error(res.meta.msg)
        this.$message.success(res.meta.msg)
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    addCateDialogClosed () {
      this.$refs.addCateFormRef.resetFields()
      this.selectedkeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    }
  }
}
</script>
<style lang="less" scoped>
  .treeTable{
    margin-top: 15px;
  }
  .el-cascader{
    width: 100%;
  }
</style>
